Drilling-bit.



J. E. PROSSER.

DRILLING BIT.

APPLICATION FILED 002m, 1913.

mmfiwn A r Patented July 21, mm

[MENTOR T") Wor o e w ,MQ retinitiii on Specification of Letters Patent,

Patented Jniy iii Mi.

Application filed October 7, 1.913. Serial No. 7923,2957.

To all? imam it may concern it known that i, Jenn EDWIN Puossnn, :1 citizen of the United States, and a resident oi Tulsa, in the county of Tulsa and State of Qidahonia, have invented s new and useful improvement in D1Li1iing-Bits, of which the following is e. specification.

My invention is an improvement in driiiing bits, and has for its object to provide a hit of the character specified, especially adapted for use in driiiing deep wells, as for instance, oil or Weiis, wherein the hit is provided with Water courses extending; from the connects to the cutting end'in spiral form. v.

in the drawings: Fignre it is a view oi the improved hit. Fig. 2 is it View at right to Fig. 1, Fig. 3 is end view iooking at the cutting end, and Fi xei is 2. sec tion on the line e etof Fig. 2. v

in the present, embodiment of the invention the bit consists of a body 1 of cyiindrical form, provided with spiral grooves 54, the said grooves extending" from one end of the body to the other and being directly opposite each other throughout. their course.

[it the cutting end of the hit, the cylindrical body reduced and flattened to t'ormopnofaces 3, and shoulders 4i site pnraiie formed o een each of the flattened. surfa cos 3 and the body of the bit. The grooves 2 are of greater depth than the width. of the s1 elders 4, as shownmoreparticularly in i 3, and the spiral course of the grooves ends at the said shouiders 4. Each of the flattened faces 3 is grooved iongitudinoiiy as shown at 9 to form n. continuation of the adjacent groove 2. Below the faces 3, the bit is heveied to form a cutting edge 5, and the said edge is of slightly greater length then the diameter of the body 1 of the bit as shown in Figs. 2 and 3. At the end remote from the cnttino' edge, the bit is reduced as shown at 6, and an ennuier shoulder Y is formed between the body and the reduced portion. At the ends oi the grooves 2, the reduced portion is flattened on opposite sides to form plane faces 8, the said faces 8 3 ing at right angles to the faces 3 at the opposite end, and each of the grooves 23 opens at one of the surfaces or,

8. Beyond the reduced portion 6, the

' htiy reduced as shown at nected' to the iowor end of the drilling stem,

and is used in. the ordinary manner. As the hit cots, it is pzuftiniiy rotated, and Water is fed to the'cutt ng' point through. the grooves 2-42, if water is not already present.

As the cuttingedge separates or breaks away prnition's of the rock, the said portions are ti'iorougoiy mixed with the Water, the mixed stone and Write passing up through the grooves 2. i 'on of the water or the mixture above mentioned, in rot the hit.

All of the nmtteront away by the cutting edge may pass :treeiy upward through the grooves, so that there is no danger of jamming or choking the driii. 'ihobit may thus out to g. much. better advantage, since the cutting action is not hindered ioy the matter niresdy separated. Y hen the hit becomes duii, the cutting be sharpened in. the nsuei manner.

i. driii comprising 2. body of apnr-oxi nieteiy cyiindricei form having one end redotted on opposite tacos to form oppositely arranged opproxiinnteiy peralioi ,surfaces, said body having it cutting edge bejy'ond the said. surfaces, the body having spiral grooves, extending to the said surfaces, and the said surfaces being grooved longitudinaiiy to form continuations of the spiral grooves, said body being ann'oiariy reduced at the opposite end and the grooves opening at the reduced, portion, said body having a threaded shank at the end remote from the cutting edge.

2. A driii comprising a. body of approximateiy cylindrical for n having one end reduced on opposite faces to form oppositely arranged tmnsverseiy pareiiei surfaces, and having a cutting edge beyond the said sur-- faces, the opposite end of the body being ennuiariy reduced, and the body having spiral grooves extending from the nnnuieriy m T v 1,104,548

reduced portion to the said surfaces, the said faoes, the opposite end of the body being, surfaces being grooved longitudinally to annularly reduced, and the body having 10 form.continuations of the spiral grooves. spiral grooves extending from the a11m1 3. A; drill comprising a body of approxilarly reduced portion to the said surfaces. mately cylindrical form having one end re- JOHN. EDWIN PROSSER. duced on opposite faces to form oppositely Witnesses: Y arranged transversely parallelsurfaces, and S. WEBER,- having a cutting edge lueyond the said sur- G. O; SIMMONS. 

